There is a growing need for appropriate management of aquatic plants in rivers and canals, lakes and reservoirs, and drainage channels and urban waterways. This management must be based on a sound knowledge of the ecology of freshwater plants, their distribution and the different forms of control available including chemical, physical, biological and biomanipulation. This series of papers from over 20 different countries was generated from the highly successful European Weed Research Society symposia on aquatic plant management, this being the ninth. The contributions provide a valuable insight into the complexities involved in managing aquatic systems, discuss state-of-the-art control techniques such as biomanipulation using fish and waterfowl and the use of straw, and deal with patterns of regrowth and recovery post-management. Careful consideration is given to the use of chemicals, a practice which has come under scrutiny in recent years. Underpinning the development of such control techniques is a growing body of knowledge relating to the biology and ecology of water plants, including growth responses under different trophic conditions, the impact of pollution, and aspects of photosynthesis. The authorship of the papers represents the collective wisdom of leading scientists and experts from fisheries agencies, river authorities, nature conservation agencies, the agrochemical industry and both governmental and non-governmental organisations.

This beautifully illustrated reference is a guide to the history of music and the instruments of the orchestra. An extended introduction provides a history of music-making around the world and outlines the evolution of the orchestra. It also features famous players, orchestras and concert halls, and the role of the composer and the conductor. A visual directory then follows, organised according to families of instruments: strings, woodwind and brass, percussion and keyboards, and the voice, as well as rare and historical instruments. Comprehensively written and beautifully illustrated with over 450 photographs, the book is an indispensable reference for music lovers everywhere.

This beautifully illustrated reference is a guide to the history of music, instruments of the orchestra and the most influential classical composers. All sections of the orchestra are covered: strings, woodwind and brass, percussion, keyboards and the voice, as well as historical, rare and non-Western instruments. An authoritative guide to over 100 of the most famous classic composers then follows. From Bach to Xenakis all styles of compositions from medieval times to the present day are included. The fascinating lives of the great composers are detailed, the places where they lived and worked, scenes from their ballets or operas, and examples of original scripts. This comprehensively updated new edition is illustrated with over 1000 photographs and illustrations.

There is a growing need for appropriate management of aquatic plants in rivers and canals, lakes and reservoirs, and drainage channels and urban waterways. This management must be based on a sound knowledge of the ecology of freshwater plants, their distribution and the different forms of control available including chemical and physical, and biological and biomanipulation. This series of papers from over 20 different countries was generated from the tenth in the highly successful series of European Weed Research Society symposia on aquatic plant management, this being the tenth. It provides a valuable insight into the complexities involved in managing aquatic systems, discusses state-of-the-art control techniques and deals with patterns of regrowth and recovery post-management. Careful consideration is given to the use of chemicals, a practice which has come under scrutiny in recent years. Underpinning the development of such control techniques is a growing body of knowledge relating to the biology and ecology of water plants. The authorship of the papers represents the collective wisdom of leading scientists and experts from fisheries agencies, river authorities, nature conservation agencies, the agrochemical industry and both governmental and non-governmental organisations.